from interface import DemoInterface

class Demo(DemoInterface):
    """
    演示类
    """

    def get_str(self) -> str:
        """
        获取字符串的方法
        """
        cus = ["kk"]
        return super().get_str(cus) 

if __name__ == "__main__":
    demo = Demo()
    print(demo.get_str())